Torch.



L. STETTNER.

TORCH.

APPLICATION FILED SEPT-20, 191s.

Patented Feb. 20, 1917.

i WITNESS:

A TTORNE Y.

UNITED STATES PATENT onnron.

LUDWIG STETTNER, OF OAKLAND, CALIFORNIA, ASSIGNOR TO GREAT WESTERN CUT- TING AND WELDING COMPANY, OF SAN FRANCISCO, CALIFORNIA, A CORPORATION or cemronm TORCH.

Application filed September 20, 1916. Serial No. 121,152.

To all whom it may concern:

Be it known that I, LUDWIG STETTNER, a

- citizen of the United States, and a resident timate and thorough mixture of the oxygen of Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Torches, of which the following is a specification.

My invention relates to improvements in piygen-acetylene torches, for welding or the An important object of the invention is to provide apparatus of the above mentioned character, having means for efl'ecting an inand acetylene gas, in desired proportions, such means also serving to prevent back-firing of the mixture.

A further object of the inventionis to provide apparatus of the above mentioned character, which is simple in construction, inexpensive to manufacture, convenient in use, strong and durable.

Other objects and advantages 6f the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same, 7

Figure 1 is a side elevation of. apparatus embodying the invention;

Fig. 2 is a central vertical longitudinal sectional view through the apparatus;

Fig. 3 is a side elevation of a valve removed;

Fig. 4 is a transverse sectional view taken on line 44 of Fig. 2, and,

Fig. 5 is a similar vlew taken on line 5 5 of Fig. 2.

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 10 designates a housing provided with a main preferably conical.opening 11, for the reception of a conical pivoted" valve 12. The

housing 10 is provided with an upper pair of alined oxygen ports 13 and 14 and with a lower pair of alined acetylene gas ports 15 and 16, as shown. An oxygen supply pipe 17 leads into a port 13', while an acetylene gas supply pipe 18 leads into the port 15, as shown. The housing 10 is also provided with anescape port 19, communicating with the atmosphere, for a purpose to be described. The pivoted valve 12 is provided with an upper transverse oxygen port 20, adapted for movement into and out of registration with the ports 13 and 14. This valve is also provided with a transverse acetylene port 21, adapted for movement Y gases. At its lower end, the valve 12 is prointo and out of registration with the ports vided With a reduced screw-threaded exten-' sion 23,.carrying a nut 24, and a washer 25 is preferably arranged between the nut and the lower end of the housing, as shown. The valve 12 is provided at its upper end with a reduced shank 26, upon which is rigidly mounted a handle 27, by means of which the valve 12 may be turned.-

The housing 10 is provided with an exteriorly screw-threaded tubular boss 28, having an interior annular acetylene gas receiving chamber 29, in communication with a tapered opening 30, leading to the'port 14, as shown. The numeral 31 designates a mixing nozzle, having a beveled flange 32,

adapted to contact with the beveled end ofthe boss 28. The inner end of this nozzle is tapered and fits withinthe opening 30, so that the longitudinally extending tapered oxygen port 33 of the nozzle is in communication with the port 14, while the acetylene gas chamber 29 has no'communication with this port, as is obvious. The chamber 29, however, has communication with the port 16, to receive acetylene gas therefrom. The nozzle 31 is provided with forwardly converging acetylene gas ports 34, the rear ends of which-communicate With the chamber 29, and the forward ends of which discharge into an annular space 36, as shown. The

deflector flange or bafiie 37, as shown.

The numeral 38 designates an expansion tube, having an apertured bore 39, increasing in diameter forwardly. This tube is provided with an enlarged tubular head 40, the opening of which has a tapered or conical end portion 41, in communication with screw-threaded shank 47,

the bore 39. This'enlarged head has screwthreaded engagement with the nozzle and cooperates therewith for forming a tapered or conical mixing'chamber 42, as shown. The enlarged head 40 is arranged. within and engaged by a coupling 43, having screwthreaded' engagement with the boss 28, as

shown.

Connected with the tube 38 1s a pipe or conduit 44, the free end of which is counterbored and internally screw-threaded, providing an enlarged chamber 45.v The numeral 46 designates a burner tip of any well known or preferred construction having a adapted for engagement'within the opening of the tube 44. As shown in- Fig.2, the inner end'of the shank 47 is spaced a substantial distance from the shoulder of thechamber 45, which functionsto retain the oxygen and acetylene gas thoroughly mixed, as it passes to the burner and this chamber 45 may be made longer by decreasing the length of the shank 47.

,In operation, the valve 12 is turned to bring the port 20 into registration with the ports 13 and 14; and the port 21 into registration with the ports 15 and 16; whereby the acetylene gas is supplied into the conical mixing chamber 42, through the circular group of ports 34, while the oxygen is passed into the chamber within the streams of acetylene gas, through the port 33. The oxygen and acetylene gas become intimately mixed in this chamber 42, and the mixture passes into the expansion tube 38, and is more intimately mixed therein. The mixture passes through the tube 44 and through the chamber 45 and into the burner tip 46, to be ignited at the free end of the burner. The arrangement of the mixing nozzle and associated elements is such that back-firing of the mixture is effectively prevented.

Should the valve 12 work loose from its seat, allowing of the escape of the oxygen and acetylene gas, or both, so that they would not be. properly supplied to the mixing chamber 42, such gas or gases will pass about the valve and its seat and discharge into the annular groove 22, and through port 19 to the atmosphere, thus following the course of least resistance and completely tively prevents back-firing in the torch for the reason that the flashback cannot reach the actylene ports 34.

Another novel feature is that of the multiple ports 34 which break the acetylene into a number of distinct and relatively minute streams and direct said streams. away from the edge of the bafiie 37 for the reasons above stated.

Anothernovel feature is that of the forwardly flared bore 39 leading from the mixing chamber 42 and which produces a soft and even flame and prevents the blowing and hissing noises of torches now known to us. 1

Another feature is that of the chamber 45 which maintains the oxygen and acetylene in thoroughly mixed condition previous to the emission of the'mixture at the burner tip.

Another feature is that of the mixing I chambers being far removed from the end known to me the mixing chamber is in the 1 .head directly over the flame whereby the gases are heated before they are mixed, thereby producing an oxidizing flame.

It is to be understood that the form of my invention herewith shown and described is to be taken asa preferred example of the same, and that various changes in the shape, size and arrangement of parts maybe re- .sorted to without departing from the spirit of the invention or the scope of the subjoined claims. c

Having thus described my invention, what I claim is 1 1. In apparatus of the character described, a housing provided with oxygen and acetylene gas ports, a valve movably mounted within the hou g to control the passage of the oxygen and acetylene gas through their ports, a tubular boss carried by the housing and having an opening commnnieating with the oxygen ports, a nozzle having one end extending into the opening and provided with a longitudinal inner oxygen port to communicate with the first-named oxygen port and forming'with the tubular boss an annular acetylene gas chamber having communication with the acetylene gas port and provided with acetylene gas ports having communication with. the acetylene gas chamber and arranged exteriorly of the longitudinal inner oxygen port, a mixing chamber receiving the forward end of the nozzle and in communication with the oxygen and acetylene gas ports thereof, a conduit connected with the mixing chamber, and a burner tip connected with the conduit.

2. In apparatus of the character described, a housing provided with oxygen and ed within the housing to control the passage of the oxygen and acetylene gas through their ports, a tubular boss carried by the housing and having an opening in communication with the oxygen port, a nozzle having one end extending into the opening and provided with an inner longitudinal oxygen port communicating with the first-named oxygen port, said nozzle forming with the tubular boss an annular acetylene gas chamber having communication with the acetylene gas port, said nozzle being provided with a plurality of acetylene gas ports sur rounding the oxygen port thereof and com municating with the acetylene gas chamber, said nozzle being further provided near its forward end and forwardly of its acetylene gas ports with a deflector, a mixing chamber receiving the forward end of the nozzle and having communication with the oxygen and acetylene gas ports thereof, a conduit connected with the mixing chamber, and a burner tip connected with the conduit.

3. In apparatus of the character described, a housing provided with oxygen and acteylene gas ports, a valve movably mounted within the housing to control the passage of the oxygen and acetylene gas through housing and provided with an opening 111 communication with the oxygen port, a nozzle having one end extending into the opening, provided with an inner longitudinal oxygen port in communication with the first-named oxygen port, forming with the tubular boss an annular acetylene gas chamber having communication with the acetylene gas port, provided with a plurality of acetylene gas ports surrounding the oxygen port thereof and communicating with the annular acetylene gas chamber, and provided near-its forward end and forwardly of its acetylene gas ports with a deflector, a

tube having a tapered bore increasingin diameter forwardly and provided with an enlarged tubular head having a tapered end wall for its bore, the tubular head being connected with the nozzle and forming therewith a mixing chamber, a coupling receiving the tubular head and boss and serving to connect them, a conduit connected with the tube, and a burner tip carried by the conduit.

LUDWIG STETTNER.

Witnesses:

FRED. W. CLIFFOR M. CLIFFORD. 

